peters



Oct. 18 1927.

H.C.PETERS ADDING MACHINE Original Filed Sept. 26. 1923 '4 Sheets$heet 1 b i lNVENTOR Oct. 18,1927.

H. c. PETERS ADDING MACHINE Original Filed Sept. 26, 1923 4 Sheets-Sheet 2 INVENT Oct. 18, Q PETERS ADDING MACHINE Original Filed Sept. 26, 1923 4 SheetsSheet 3 INVENfiR 1,646,105 Oct. 18, 1927- c, PETERS ADDING MACHINE Original Filed Sept. 26, 1923 4 Sheets-Sheet 4 Patented Oct. 18, 1927.

HEBER G. PETERS, OF NEW YORK, N. Y.

ADDING MACHINE.

Application filed September 26, 1923,

The present invention while applicable to calculating machines of any character which are operated b rocking a lever or handle, is especially a apted for use in connection with adding or calculating machines of that type which I and described in m vember 29, 1916, issued August 2,

As is well known to those familiar with the art, in calculating machines operated by rocking a lever or handle, a false result may be obtained or parts of the machine become jammed by departing from the prescribed method of operation. To prevent this happening it is customary to provide certain locks and interlocks which operate to comel a correct manipulation of the machine.

2 y purpose has been to provide means whereby any false results or 1amming of the machine during its operation, that can be caused by first o erating only partially keys controlling certain calculating functions, be-

2 fore the operating handle is moved, or by operating the handle only partially before the total key or sub-total key is moved, are wholly prevented. To do this I provide means whereby the operating handle is locked against complete forward movement whenever any key controlling certain calculating functions of the machine is operated only partially before the operating handle is moved forward and whereb the total and sub-total ke is locked i the handle is moved forward only rtially. In the accompanying drawings t is is shown particularly in connection with those keys known as number keys controlling the listing of amounts, and the key known as the correction key used for restoring to normal number keys wrongly depressed or to restore to normal other keys moved into 0 crating position, such as the keys control ing the functions of totaling-sub-totaling'-and non-adding. I do not wish to be considered, however, aslimiting my invention in a plication only to keys controlling the a ve specified functions.

Further as is well known to those skilled in the art, in adding machines of the type where the rack forming a art of the accumulating and the printing unctions advances on occasion one step to effect a transfer of a unit from a lower to a higher order, it is necessary whenever such a transfer has been application filed Noerial Number 133,846, 1921, Patent Number have fully illustrated Serial No. 664,899. Renewed July 12, 1927.

made that the rack be restored to its normal position by a subsequent stroke of the handle before the sum is printed in order to prevent a short total being recorded in lieu of the correct total. It is also considered desirable to separate on the printed slip by means of a spacing stroke (i. e. a stroke when no printing or adding is done by the machine). the total of the items from the last item recorded, to assist the eye to readily distinguish the total from the items. have, therefore, provided a new and novel means for always insuring the taking of a spacing stroke after an item is recorded in the machine before the sum of the items registered in the machine can be printed.

In the drawings which form part of this specification and illustrate a preferred form of embodiment of invention I have designated the total and sub-total key TST-the non-add key NA and the correction key C as these designations are those commonly placed on machines to identify these parts. The operating handle I have designated H.

Fig. 1 illustrates a right side elevation 'with parts in normal position the operating handle being shown in dotted lines.

Fig. 2 is a left side elevation partly in section said figure illustratin nism relating particularl trolling the operation 0 or composin the locking devices, the operating handle ing shown in full lines.

Fig. 2 is a view of detailed parts of the machine shown in pers ective.

Fig); 3 is a left side e evation showing the position assumed by some of the parts when the operating handle is moved forward from A, its normal position, to B the position where the lockin pawl becomes effective, the total key Tr T having been first moved partially into its operative position. Fig. 3 is a view of a detailed part of the total key locking mechanism shown in perspective; and Fig. 3 is a detailed fragmentary view of certain parts. Fi 4 is a right side elevation of the keyboar showin the articular mechanism controlled by t e num er key to o erate the locking pawl when any number ey is depressed only partially.

Fi 5 is a partial end elevation of the keyboar showing the bail (17) in its relation to the number key latching shutter.

Fig. 5 is a partial end elevation of the keyboard showing a number key fully deto t 0 .parts conthe mecha-- pressed and held in depressed position by the latching shutter (16) and another number key partially depressed causing the latching shutter (16) to depress the hail (l7) and thru the mechanism provided to move the locking pawl 4 into path of top 3.

l is an S-shaped lever mounted to swing freely on a stud 1" supported in the right side frame 2 of the machine. One end of the lever 1 is held against the stud 3 mounted on the key TST, hy the tension of the spring 1". The face of this end is recessed engaging stud 3 so that any movement of the key TST in either direction will cause the contacting end of lever 1 to rise and thus cause the 0 posite end to he depressed (see Fig. X locking pawl 4 is mounted to swing freely on a stud 4 supported in the side frame 2, its rearward end tending to move downward under the tension of the spring 4, the tension of'said spring being less than that of spring 1 with the result that the rearward end of the locking pawl 4 may he raised by the lever l. 1 stop pin 4 mounted in the frame 2 acts to limit the downward movement. A pin 4". mounted on the rearward end of pawl 4. contacts with the forward end of lever 1. Thus when the key TST is moved in either extreme direction the rear end of lever 1 will he lifted and the forward end depressed and pawl 4 under tension of spring 4 willmove downward into the path of the projection 5. a steel block riveted on the plate 6. and thus will prevent the comlete forward movement of the operating l fandle, permitting movement of said handle only from position A to position B as shown in Fig. 3. It is evident if the forward end of lever 1 is depressed by any other means. the pawl 4 will move into operative position.

The three armed lever 7 (Figs. 1 and 2) is mounted to swing freely on a stud 7* supported in the right side piece 21, of the kevhoard.- A spring 7 of tension sutficient to overcome tension of spring 4". one end of which is fastened to the forward arm of lever 7 and the other end to the lower plate of the keyhoard. acts to move the forward arm of lever T downward. and the rearward arm upward. and the depending arm rearward. The right angled projecting lip 7 of the depending arm hearing against the face of the hell crank 8 normally tends to limit the rearward movement of the depending arm of lever 7. The lower surface of the rearward extending arm of the lever .7 contacts with a stud 1 riveted in the forward end of lever 1.

The hell crank it and latching pawl 9 are both mounted to swing freely on the screw stud 8 supported in the side frame *2. Thru the movement of the connecting link it). the hell crank 11 and the long link 12 it is evident; (see Fig. 2} that whenever the key TST is moved con'ipletely forward or hack:

ward the hell crank 8 will be rocked so that its forward end will move downward and the projecting lip 7 of the three armed lever 7 will move rearward under the tension of the spring 7* when the step portion of the forward end of hell crank 8 passes the projecting lip 7". This serves to latch the key TST in either its forward or rearward position. Simultaneously with the latching of the key TST the rearward pro of the three armed lever 7 will jecting arm move upward and will contact with the stud 4 of the pawl 4 and lift pawl 4 out of the path of hlock thus making possible a complete forward movement of the operating handle.

If the key NA he moved rearwardly. the forward end of the latching pawl 9 will he moved upward thru the link 13 and the latching point 9 will immediately by contact with the lip T cam the depending arm of lever 7 forward. This will depress the rearward extending arm of lever T which contacts with pin 1 and will depress the forward extending arm of lever l and thus cause the pawl 4 to move into operative position where it will remain until hy the continued upward movement of paw] 9 the lip 7 passes under the latch ng point 9 latch ing the lever NA in operative position and allowing the lever t and also the pawl 4 to return to normal position.

It is evident. therefore. that any partial movement of the key TS'I in either direction or any partial movement, of the kev NA will lock the opera ing handle ll again t complete forward movement and said lock will remain effective. until the, kev TST or the key NA is either latched in operative position or returned to normal.

If the correction key he partiallv or fully depressed. the rearward end of the correction key lever 14 looselv mounted on the stud l4 supported in the right sid piece of the keyhoard. will move upward against the tension of the spring 14. Rivcted in the rearward end of lever 14 is a pin 14 which contacts with the lower edge of the forward arm of lever 7. The depres sion of the kev C will thus cause the forward arm of lever 7 to rise and the rearward arm to he depressed which thru the means provided will move the pawl 4 into operative po ition to prevent a omplet forward movement of the operating handle.

Referring to Fig. 5 the numher kev 15 is provided with a cam surface 15* which contacts with the latchin shutter ltl which swings said shutter to the rightwhen the kev i partially depresed and allows he shutter to return to normal position when the key in fully depre ed. The edge of shutter 16 contacts with the cam surface 17' of hail l7 aid hail extending across the keyboard from left to right and having a cam surface 17"- contacting with the latch ing shutter for each row of keys. The bail 1'? is supported. at each end by levers 18 which are pinned to shaft 19. said shaft passing thru the keyboard from left to right and having its hearings in the side'pieces of the keyboard. On the right end of the shaft 19 is pinned the arm 20 extending rearwardly. the end of which contacts with the pin 22 riveted in the forward projecting arm of the lever 22. Lever 22 is pivoted near its center on the end of shaft 23 and is held in position by spring 22". Its rearward arm carries a pin 22 which contacts with the forward projecting arm of lever 1. Thus when a number key 15 partially depressed the latching shutter 16 moving to the right contacts with the cam surface 17' causing the bail 17 to be depressed and rocking the shaft 19 so that the arm 20 is lifted. This causes the forward extending arm of the lever 22 to be'lifted and the rear extending arm of the lever 22 to be depressed thus permitting movement of the pawl 4 into operative position as already described. The pawl 4 will remain in operative position until the number key is fully depressed when the latching shutter 16 will return to its normal position holding the number key depressed, and allowing the bail 17 to rise and the arm 20 to return to normal and the pawl 4 to be moved out of the path of block 5. It will thus be seen that when any number key is depressed only partially the operation of the machine is wholly prevented.

On short studs supported in the side plates of the printing section (Fig. 2) is the U- shaped piece 24 pivoted at 24 adjusted to rock freely backward and forward on occasion, the bar connecting the upright arms of U piece 24 being drawn rearward by the tension of the spring 24". Said bar is placed in the path of the forward extended lower ends of the type bars 25 so that whenever the lower end of a type bar passes the bar of the U piece 24 if said bar is in its path said bar will be swung forward and the up r end of right arm 24 of U piece 24 wil be swung rearwardly. The mechanism is so adjusted, however, as will be described later that the end of type; bar 25 will pass freely the bar of U piece 24 when a type bar is rising to above the zero printing position but will engage it on its return. When 24 is swung rearwardly by means described later, it releases the three armed lever 26 by disengaging the latch formed by the lip 26 and projecting face 24 (see Fig. 3) the vertical arm of 26 moving forward under tension. of spring 26". The three armed lever 26 swings freely on stud 26 supported in side frame 2. Its vertical arm is curved forward and carries at its end a pin 26. Its long r arwardly extending arm carries at its end a passby or wipe pawl 26 which operates against tension of spring 26 (see Fig. 3), the spring stud 26' by contact with the edge of lever 26 limiting the movement of pawl 26 in one direction. Its left rearward extending arm has'at its rearward end a right angled hp 26 which normally latches under the projection on the edge of the arm 24 resisting the tension of the spring 26".. When the piece 24 is rocked b the movement of the type bars 25 or by ot er means than the type bar 'to be described later, the latch formed by 24 with the lip 26 will be released and the pin 26 can move forward,

the lip 26' rising in front of 24 holding.

24 in its new position. If the key TST is in its normal inoperative position the pin 26 will enterthe slot 27 in the face of key TST and will prevent movement of key TST in either direction. If the key TST has been moved only slightly out of normal inoperative position in either directi the p1n 26 will enter the enlarged porti n of the slot 27 and by contact with one or the other of the faces 27* will prevent the further movement of the key TST in one directron. If the key TST has been moved in either direction a greater distance than that governed by the enlarged portion of the slot- 27, the pin 26 will come to rest against the edge of the key TST (see Fig. 3) the pawl Wlll however by this time have been allowed to move into the path by depressing the forward end of lever 1, due to action of p1n 3 acting on cam surface on rear end of lever 1 of block 5 locking the handle against forward movement.

\Vhen during the operation of the machine shaft 28 is rocked backward and forward by the operating lever and its connection as fully described in Pat. #1,386,021, issued August 2, 1921 to H. C. Peters, the stud 29 carried on the arm 30, said arm being p nned to shaft 28, follows a path that brings its lower face in contact with the wipe pawl 26. ()n the forward stroke the stud 29 passes by the pawl 26 without affecting the position of the lever 26 but on the backward stroke the stud 29 engages the pawl 26 depressing the rearwardly extending arm of 26 thus latching said lever by engaging lip 26 at 24 and restoring said lever 26 to its normalfinoperative position shown in Fig. 2. It will thus be seen that if a number key is depressed on the keyboard that on the forward stroke of the handle the corresponding type bar will rise freely above the zero printing position, the latch at 24 and .26 having been released by means to be described later (see lines-'13 to 23 page 9). This normally allows 26 to move forward and engage the slot 27 holding the key TST against operation. On the return stroke the mechanism is so timed that the stud 29 engages the pawl 26 and restores the lever 26 function of the machine but said movement to normal inoperative position before the extended end of the type bar 25 passes the bar of U piece 24 and the continued downward movement of said type bar 25 will again release the latch formed by 24 and 26 and again allow the pin 26 to move forward and engage slot 27 in key TST and prevent the movement of key TST in either direction. It will thus be seen that this arrangement prevents the operation of the key TST immediately after a figure of value has been recorded in the machine and until a spacing stroke has been taken i. e. a stroke during which none of the type bars rise above the zero printing position.

For reasons to be made clear I have provided a means to insure that with every for ward stroke of the operating handle the bar of U piece 24 will be moved forward and the latch. formed. by 24 and 26 released, allowing pin 26 to move forward and engage slot 27 whether a type bar passes above the zero printing position or not.

On U piece 24 is mounted a wip pawl 31 pivoted on a stud 31 supported in the arm 24 of U piece 24. The rearward end of the pawl is held downward by tension of spring 31 this downward motion being limited by the contact of the lower edge of the pawl 31 with the surface of the bar of J piece 24. A clearance at 31 however allows free upward movement of the rear end of pawl 31 when required. The rear end of pawl 31 carries a pin 31 which engages a recess in the arm 32 which is mounted on and pinned to shaft 28. Above the recessed portion, the face of said arm 32 is radial with the center on which it swings. It will be seen that immediately the shaft 28 starts to move with the forward stroke of the operating handle, the bar of U piece 24 will be swung forward by the action of arm 32 moving downward and forcing pin 31 out of recess in the face of said arm 32 and that the latch formed by 26 and 24 will be released and pin 26" will be free to move forward and engage slot 27 in key I TST. Pin 31 will ride on the radial surface of arm 32 and at the end of the return stroke will again enter the recessed portion of arm :32. During the return stroke the tension of spring 31 will be overcome by the greater tension of spring 24*.

It will thus be seen that any forward movement of the operating handle will lock the key TS'l again t operation it said key is in its normal inoperative po ition. if key TN'T is moved slightly in e ther direction the pin :26" will engage the faces 2? of the en larged portion of slot 27 this nlarged portion being of ui-h dim nsion that th mom ment of key TST when the faces 12? can contact with pin 26" has not yet een sufficient to affect the totaling or sub-totaling has been great enough to move lever 1 sufticiently to cause latch 4 to move into operative position lockingthe handle H against complete movement. This insures that either the key TST or the operating handle H will be locked against operation if a partial movement of either ke or handle is attempted before the other is moved. The distance that the operating handle can travel before being arrested by the pawl 4 engaging the block 5 .assures the unlatching of lever 26 and the engagement of pin 26 with slot 27, thus locking key TST if the handle is moved slightly in advance of attempted operation of the key TST.

I claim:

1. In an adding machine the combination of an operating handlefi-a total and sub-total ke va non-add key-a correction keyrows of number keys and a single means operable by said keys for preventing the complete forward movement of said operating handle-said single means operating to block the complete forward movement of said operating handle whenever any one of the said keys is moved into operative position only partially.

2. In an adding machine the combination of an operating handle-a total and subtotal keya non-add key-a correction keyrows of number keys and a single means operable by said keys for preventing the complete forward movement of said operating handle when any of said keys is depressed only partially-said single means also operating to block the complete forward movement of said operating handle whenever the correction key is fully depressed.

In an adding machine the combination of an operating handlede ressible number keys and latching means 1 or holding said number keys depressed. of means controlled by said latching means to prevent the complete forward movement of said operating handle when any number key is depressed only partially.

4. In an adding machine the combination of an operating handle. a keyboard with rows of depressible number keys. a shutter for each row holding any number key in that row in its depressed position. a hail co-acting with all the shutters and means operable by said bail to prevent the complete forward movement of the operating handle when any number key is depre sed only partially.

In an adding machine the combination of a totaling means and a printing means and means controlled by the printing means for locking the totaling means against op cration after an item has been printed.

(3. in an adding machine the comhii'iation of a totaling means anti a printing means and means controlled in the printing means for locking the totaling means against ope-1 ation after an item has been printedsaid locking means being operated by a member of said printing means when said printing means member is returning to normal position.

'7. in an adding machine the combination of an operating handle number keysa correction key, keys controlling the operations of totaling-sub-totaling and non-adding with a single means acting to prevent the complete forward movement of the operating handle whenever any of the said keys are moved only partially into operating position, the operation of said single means be ing controlled by the partial movement of any one of said keys.

8. In an adding machine the combination of an operating handle, a total key, latching means to hold said key in operative position, and a pawl mounted on a stationary part of the machine, a projecting surface on a moving part of the machine moved by the operation of the operating handle and placed to co-operate with said pawl to prevent the complete movement of said operating handle, of means for moving said pawl into the path of said projection whenever the total key is moved only partially into-operating position and means for removing said pawl from the path of said projection simultaneously with and by the operation of the latch: ing means.

9. In an adding machine the combination of an operating handle, a total key, latching means to hold said key in operative position, and a pawl mounted on a stationary part of the machine, a projecting surface on a moving part of the machine moved by the operation of the operating handle and placed to co-operate with said pawl to prevent the complete movement of said operating handle, of means for moving said pawl into the path of said projection when the total key is moved only partially into operating position, and means for removing said pawl from the path of said projection by the operation of the latching means.

10. In an adding machine the combination of an operating handle, a non-add key, latching means to hold said key in operative position, and a pawl mounted on a stationary part of the machine, a projecting surface on a moving part of the machine moved by the operation of the operating handle and placed to co-operate with said pawl to prevent the complete movement of said operating handle, of means for moving said pawl into the path of said projection when the non-add key is moved only partially into operating position and means for removing said pawl from the path of said projection by the operation of the latching means.

11. In an adding machine the combination of an operating handle, a depressible number key, latching means to hold said key in operative position, and a pawl mounted on a stationary part of the machine, a projecting surface on a moving part of the machine moved by the operation of the operating handle and placed to co-operate with said pawl to prevent the complete movement of said operating handle, of means for moving said pawl into the path of said projection when a number key is depressed only partially and means for removing said pawl from the path of said projection simultaneously with the operation of the latching means when the number key is depressed fully.

12. In an addin machine the combination of an operating andle, a number key, a latching means to hold said key in operative position, and a pawl mounted. on a stationary part of the machine, a projecting surface on a moving part of the machine moved by the operation of the operating handle and placed to co-operate with said pawl to prevent the complete movement of said operating handle, of means for moving said pawl into the path of said projection when a number key is moved only partially into operating position and means for removing said pawl from the path of said projection by the operation of the latching means.

13. In an adding machine an operating handle, a key controlling the function of totaling arranged to be latched in operative position, latching means for said key, locking means to prevent the complete operation of said handle and means operated by the latching means to render the locking means inoperative.

14. In an adding machine an operating handle, a key controlling the function of subtotaling arranged to be latched in operative position, latching means for said'key, locking means to prevent the complete operation of said handle and means operated by the latchingmeans to render the locking means inoperative.

15. In an adding machine an operating handle, a key controlling the, function of non-adding arranged to be latched in operative position, latching means for said key, locking means to prevent the complete operation of said handle and means operated by the latching means to render the locking means operative.

16. In an adding machine an operating handle, a key controlling the function of totaling and sub-totaling arranged to be latched in operative position, latching means for said key, locking means to prevent the complete operation of said handle when the key is moved only partially into operative position and means operated by the latching means to render the locking means inoperative.

New York, N. Y., September 25, 1923.

HEBER C. PETERS. 

